Start With a Reverse Image Search

Save the image first. A screenshot of the page is less useful than the image file itself, so right click or long press and save the picture directly. Then open Google Lens and upload it. Lens will return visually similar results across auction archives, museum collections and print shops, which is usually enough to identify the design within a few minutes. TinEye is worth a second pass because it indexes differently and sometimes finds the exact page you saw originally.

If the first attempt fails, crop the image. Koson's compositions are often dominated by a single bird or branch, and search engines match on that focal element far better than on a full sheet with borders and text. Crop tightly to the animal, run the search again, and compare results by eye rather than trusting the top hit. The frustration of a dead end usually comes from a blurry or watermarked file, and a cleaner crop fixes most of it. Once you have a match, note the Japanese title if one is given, because it unlocks better results than the English rendering.

Use Museum Databases and the Right Terms

Koson worked in the shin-hanga movement in the decades around 1900, and his bird and flower designs were published in Tokyo, most famously through the publisher Watanabe Shozaburo. Because the designs were printed in multiple editions, the same image appears under slightly different titles across databases. Searching the Japanese title, or the artist name spelled Ohara Shoson, which he used in some periods, will surface records that an English search misses.

The Metropolitan Museum of Art, the Rijksmuseum and the British Museum all hold Koson sheets and publish them online with high resolution images. Browsing those records lets you confirm the design, the date and the title before you buy anything. If you are deciding how the image should look once found, the choice between formats matters more than most people expect, and choosing between canvas and a framed poster covers it plainly. For identifying what the subject actually is, the common subjects in Koson's work gives you the vocabulary to search with.

What to Do Once You Have Found It

Identification and purchase are separate steps. Once you know the title, searching that title plus the artist name will return every shop currently reproducing it, and you can compare sizes and prices at leisure. Be aware that the original woodblock prints are a collector's market with its own pricing, authentication conventions and dealers. A reproduction edition is a different product at a different price, and there is no reason to confuse the two when all you want is the image on a wall.

A practical note on naming. The same design may be listed under Koson, Shoson or even Hoson, the signatures he used at different points in his career. If one spelling returns nothing, try the others before concluding the print is unavailable. And if the image you saw was itself a reproduction from a shop that has since closed, the museum record of the original design is your most reliable route back to it. Sizing is the last decision, and what size print fits a small living room handles that question directly.